Multiple-spindle grinding machine or the like



, 1931. w. L. BRYANT MULTIPLE SPINDLE GRINDING MACHINE OR THE LIKE March 3' Filed April 19, 1927 18 Sheets-Sheet l a W M, M W, Q mg WINNN. QM

March 3, 1931. w. BRYANT L 1,794,440

MULTIPLE SPINDLE GRINDING MACHINE OR THE LIKE Filed April 19, 1927 March 3, 1931. w. L. BRYANT 0 MULTIPLE SPINDLE GRINDING MACHINE OR THE LIKE Filed April 19, 1927 1,8 Sheets-Sheet 3 March 3, 1931. w Nqr 1,794,440

MUL'IIPILIE SPINDLE GRINDING MACHINE OR THE LIKE Filed A ril 19, 1327 l8 SheetsSheet 4 K \J @Q @N fix M \ww w M @WNN March 3,. 1931.

W. L. BRYANT MULTIPLE SPINDLE GRINDING MACHINEOR THE LIKE 1 8 Sheets-Sheet 5 18 Sheets-Sheet 6 W. L. BRYANT Filed Apljil 19, 1927 ZZZ? A Q N MULTIPLE SPINDLE GRINDING MACHINE OR THE LIKE March 3, 1931.

March 3, 1931. w BRYANT 1,794,440

MULTIPLE SPINDLE GRINDING MACHINE OR THE LIKE Filed April 19, 1927 18 Sheets-Sheet 7 March 3, 1931. w 1 BRYANT 1,794,440

MULTIPLE SPINDLE GRINDING MACHINE OR THE LIKE Filed April 19, 1927 18 SheetsSheet 8 March 3, 1931. w. BRYANT 1,794,440

MULTIPLE SPINDLE GRINDING MACHINE OR THE LIKE Filed April 19, 1927 18 Sheets-Sheet 9 r fi 55K,

March 3, 1931. w. 1.. BRYANT 1,794,440

MULTIPLE SPINDLE GRINDING MACHINE OR THE LIKE l8 Sheets-Sheet 10 Filed April 19, 1927 w. L. BRYANT MULTIPLE SPINDLE GRINDING MACHINE OR THE LIKE March 3, 1931.

Filed April 19, 1927 18 Sheets-Sheet 11 430 an; uzmwh J 1. A. NM a 0 March 3, 1931. w. L. BRYANT 1,794,440

MULTIPLE SPINDLE GRINDING MACHINE OR 1HE LIKE Filed April 19, 1927 1.8 Sheets-Sheet 12 March 3, 1931. w. L. BRYANT MULTIPLE SPINDLE GRINDING MACHINE OR THE LIKE Filed April 19, 192'? 13 Sheets-sheaf 13 W. L. BRYANT March 3, 1931.

MULTIPLE SPINDLE GRINDING MACHINE OR THE LIKE l8 Sheets-Sheet l 4 Filed April 19, 1927 March 3,, 1931 W. L. BRYANT MULTIPLE SPINDLE GRINDING MACHINE OR THE LIKE Filed April 19, 1927 1,8 Sheets-Sheet l5 March 3, 1931. w. L. BRYANT MULTIPLE SPINDLE GRINDING MACHINE OR THE LIKE Filed April 19, 1927 l8 Sheets-Sheet l6 March 3,1931. w; L, BRYAN-r 1,194,440

MULTIPLE SPINDLE GRINDING MACHINE OR THE LIKE Filed April 19, 1927 18 Sheets-Sheet l7 q Zia March 3, 1931. w. BRYANT MULTIPLE SPINDLE GRINDING MACHINE on mm LIKE 1s Sheets-Sheet 18 Filed April 19, 1927 Patented Mar; 3, 1931 UNITED s' rfAjTEs PATENT oFF ca WILLIAM ti. Barman, or SPRINGFIELD, VERMONT MULTIPLE-SPINDLE GRINDING MACHINE OR THE LIKE Application filed April 19,

holder loading and delivering position." Each of the tools is intended to perform a part only of a single machining operation, each tooling operation completing the machining operation onrone piece of work, and commencing the machine operation on another piece of work, any intermediate tools performing in termediate parts of the complet'e operation.

In the particular embodiments of the invention hereinafter described in detail by Way eve'r,-intending in any way to limit the invention to any particular machine, the work holders are carried in a rotatable drum in which they are arranged inscircular' series in what may be termed a headstock of the machine. shown are grinding wheels have their spindles arranged in similar series but with one position vacant to provide a'loa'ding and un loading station for the work in ahead ad jacent to one'end of the drumcarrying the work holders. Relative traversing motions 7 between the work holders and the tool spindles are effected, in the present embodiment this being accomplished by so mounting the tool spindles that they may be traversed axiallyrelative to the work, there being one work holder which is not in operative relation to a tool so that this holder is free during-the tooling operations on work on each of the others to have a finished piece ot work removed therefrom and a new pigce placed in position. v

The tool spindles are positioned between the headstock and what may be termed atailstock-which in the embodiment shown,- ;con-- tains traversetnechanism and certain of the mechanism for imparting rotary motion to the work holders.

' C3 Means arealsoprovided tor' ffi fi h' ative position for the tools from and'to a of illustration of the. invention without, how-- The tools which in the embodimentsmachme'or duetowear. a

1927. Serial No. 184,851.

tive rocking about the axis of the series of work holders and tool spindles to provide feed and retracting motions to the tools relative to the work, and in the constructions herein shown and described the tool spindles are given this motion.

Means may be provided also for automatically truing the tools at predetermined times during the operation of the machine.

The provision of a plurality of" work holders and a plurality of tools working simultaneousl on the work held by'these-holders,

the wor progressing from one to a succeeding tool, presents marked advantages] :over the usual single work holder single tool .6

arrangement. One, of these is that it makes possible the use of tools each particularly adapted to' the particular work it is called upon to perform. For exam Ie, the first tool of the series'may be call upon to act on the relatively rough, hardskinofa castv ing. It can, therefore, be a tool particularly adapted for such service since it is not called upon for any other. Likewise the last tool may be particularly designed to provide a high finish andmay. indeed be alap if desired, and may be'adjustedso that it is not called upon in any case to remove any considerable amount of metal. Similarly the amount and character of work which any other tool is called upon to perform is the same for each piece of work; While the extent of movement of feed and retraction of each of the tools is the same, yet by adjust ment, the amount of suchmovement eifective to determine the depth of cutfor an particular tool may be varied. Thus eac tool may be made to take whatever de th or character ofcut is desired without re erence to any other and without resetting 99 of eitherwork or tool. At each step In step, or indexing movement of the work hol er relative to the tools, moreover,-the desired complete operation on-one piece of work is finished and a new piece is placed in position.

Indexing may also -be 'rovided so that the work in'eachof the ho! ers ma be finished to the-same dimensions regardless efsli ht inaccuracies in construction of the"? it While the invention iszparticularly suitable for a machine for grinding plane internal work, it is not limited thereto, one embodiment herein shown being designed to grind the inner race surfaces of ballbearing outer raceway members.

For a more complete understanding of this invention, reference may be had to the ac- 1 companying drawings in which Figure 1 is a front elevation of a grinding machine embodying this invention.

Figure 2 is a right end elevation of the same.

Figure 3 is a section on line 3-3 of Figure 1.

7 Figure 6.

Figure 8 is a detail section on line 8 8 of Figure 7.

Figures 9 and 10 are fragmentary sections on lines 99 and 10 -10, respectively, of Figures 1 and 11.

Figure 11 is an enlarged detail of the cross feed mechanism substantially as shown in Figure 1. v

. Figure 12 is a detail section on line 1212 of Flgure 6. v

Figure 13 is a detailed section to enlarged scale of a work holder. 3

Figure 14 is a detail of the work holder and tool supporting drum.

Figure 15 is a section on line 15-15 of Figure 14.

Figure 16is an elevation to enlar ed scale of the traverse control shown on t e right hand portion of Figure 1.

Figure 16a is a sectional detail.

Figure 17 is a detail section on line 17-17 of Figure 16.

Figure 18 is a section on line 1818 of Figure 11.

Figure-19 is adetailto an enlarged scale of apart shown in Figure 18.

Figure 20 is a section on line, 20-20 of Figure 16.

Figure 20a is'a diagrammatic view of the traversing speed change and reverse gearing.

Figure 21 is a fragmentary section showing one of the tool spindles and its driving motor. A

Figure 22 is a view partly in section of the loading mechanism.

Figure 23 is a detail partlyin section show ing a relation between the work grinding wheel and truing device.

F' 24 to 26 are diagrammatic details showing relative positions of work grinding 5 is a detail elevation showing the wheel and truing device in difierent parts of the cycle of machine operations.

Figure 27 is a fragmentary front elevation of a machine construction designed to grind the raceways of outer ballbearing rings.

'of Figure 29.

Figure 31 is a detail section on line 31-31 of Figure 30.

Figure 32 is a fragmentary elevation of the traversingmechanism shown at the right hand portion of Figure 27.

Figure 33 is an elevation of the same taken atright angles to Figure 32.

Figure 34 is a detail section on line 3434 of Figure 33.

Figures 35, 36 and 37 are detail sections on lines 35-35, 3636 and 37-37, respectively, of Figure 34.

Figures 38 to 41 are diagrammatic/Views illustrating relative positions of work grind-' ing wheel and truing devices in difiere'nt parts of the machine cycle.

Figure 42 is a diagram of control cams for the feed while the grinding wheel is in the position shown in Figure 38.

Figures 43, 44 and 45 are diagrammatic views showing successive positions of portions of the traverse control mechanism.

Fi re 46 is a view similar to Figure 42 but s owing the parts in difl'erent positions.

Figure 47 shows the truing device controllin mechanism.

11 general the machine comprises a bed traversed between the head and tailstocks by a mechanism supported by the tailstock.

Work holding and dn'm'ng mechanism Within the headstock portion 2 is mounted for rotation about a horizontal axis extending toward the tailstock a work holder supporting drum 10 shown detached in Figures 14 and 15. This drum is provided with annular tapered bearin faces 11 and 12 mating corresponding sur aces of the headstock 2. The larger end of the drum is rovided with an annular shoulder 13 exten ing over theend 14 of the headstock, these parts being held in engagement with each other by means of a retaining ring 15 (see Figure 7) having a flange portion 16 engaging the outer face of a worm ring gear 17 which rests a ainst a shoulder 18 on the end of the drum. T e retaining r' 15 is resiliently held to ward the headstoc by means of screws 20 threaded into the headstock, and carrying, 

